Add following logging events:
* preview-realtime-error-stopped: triggered when realtime preview
auto-load is stopped.
* preview-realtime-reload-error: triggered when realtime preview pane
shows an error message and the reload button shown in this message is clicked.
* preview-realtime-reload-hover: triggered when the reload button
that shows on hover in the realtime preview pane is clicked.
* preview-realtime-reload-manual: triggered when the reload button in
the realtime preview pane manual bar is clicked.
Bug: T306176
Change-Id: I0785b0a8e88125a9bb30ff5c64c8a7c50b556c63
Change the handling of the manual reload button's accessKey to
only refresh the preview if the pane is currently open.
Duplicate change to ManualWidget's handler.
Bug: T307805
Change-Id: I0f07ff346eef4bd93d13d55548381a71c0f660d3
Make the manual-mode loading bar clickable by turing it all into
an anchor element with various mixins for functionality.
Also adds a tooltip to the whole bar, and makes the same accesskey
work (including when the preview pane is closed).
Bug: T306590
Bug: T306906
Bug: T306880
Change-Id: I915a430300c75256d89b929e3925d0ea714807bb
After three slow preview requests, switch to showing a bar at the
top of the preview area that contains a manual 'reload' button.
The manual bar will be hidden when an error message is show, but
re-shown again after the error is dismissed. Closing and
re-opening the preview pane doesn't reset the manual mode.
Bug: T304568
Change-Id: Ia72bd1ceab68fdaed5de53137bd8ac5961db4714
